Disintegrator



Feb. 4, w DUNCAN 1,745,478

' DISINTEGRATOR Filed July 1,' 1927 a Sheets-Sheet 1 14/. m. DUNCA Feb.4, 1930.

W. M. DUNCAN DISINTEGRATOR Filed July 1, 1927 3 Sheets-Sheet 2A/VENTo/P: 7 IV. M DUNCA/V. 5r GUM/mg- T PQJHQ Feb. 4, 1930. DUNCAN1,745,478

I DISINTEGRATOR Filed July 1, 1927 5 Sflets-Sheet 5 W .4; J g 4 Qv-mwg-mm Patented Feb. 4, 1930 PATENT oFFicE wILLIAMim'nUNoAN, or ALTON,ILLINOIS DISINTEGRATOR Application filed July 1, 1927. Serial No.202,800.

This invention relates to disintegrators adapted to act upon variouskinds of mate-' rial such as coal, rock, etc. In this art there U arethree recognized processes'of 'disintegra-.

tion, namely, rolling, attrition and impact. Each process hassomeadvantages not found inthe others, but prior to this invention, thethree processes of disintegration have not w been successfully carriedout during one operation.

One of the objects of this invention is to roduce a disintegratorwhichnot only subects the material to the above named processes,but'which successfully and efficiently causes the material to undergothese three processes during one operation.

Another object of thisinvention is to provide a device which may beinstalled betweensuccessive disintegrators to remove material 2 1 of therequired fineness, without removing the'tailings which pass into; thesucceeding disintegrator. l

Withthe foregoing and other objects in View, the invention comprises thenovel methed, construction, combination and arrangement of partshereinafter more specifically describ'ed'and illustrated in theaccompanying drawings, wherein is shown the. preferred embodiment of theinvention. However, it is ,3};- to be understood that the inventioncomprehendschanges, variations and modifications whichcome within thescope of the claims here unto appended.

- Fig. 1 isaside elevation, partly in section,

illustrating an apparatus embodying the features of this invention. I

' Fig. '2 is a vertical section taken approxiniately on the line 2.2 inFig. 1, showing thestationary casing through which material eo isdischarged from a rotarycasing.

In Fig. 1, A designates a disintegrator including a rotary casing, whichwill be hereafter described, located above a disintegrator B whichreceives material discharged from the upper disintegrator.

The lower disintegrator B is shown by Figures 1, 3, 4 and 5. Itcomprises a stationary cylindrical casing 1 closed by heads 2 and 8, butit is to be understood that the casing may be of any suitable shape.Material to be pulverized in the casing B is introduced through an inlet4 while the pulverulent material is discharged through the outlet 5.nates legs for supporting the stationary casing. The head 3 (Fig. 4) isprovided with ports 7 for admitting air to the'discharge end of thecasing, so as to provide for air sweeping whenever this is necessary ordesirable. The admission of air may be regulated7by opening or closing acover 8 at the port 9 designates a rotor secured to a shaft 10 which issupported in bearings 11. The periphery of the rotor 9 is provided withpushing elements 12 separatedfrom each other to form recesses in whichrolling elements 13 and 14 are placed. The directions of rotation of therotor and rolling elements are shown by arrows in Fig. 3. These rollingelements may be of any desired shape.

The rolling elements 14 (Fig. 4) are preferably larger than the rollingelements 13, and these elements are separated from each other by acircular member 15 which retards the material tending to pass from theelements 14 to elements 13. It is also beneficial to have the recesseswhich receive the rolling elements 14 staggered, or oilset, relative tothe recesses which receive the rolling elements 13, thereby presentingadditional resistance to the flow of material through the disintegrator.

Flanges 16 and 17 prevent excessive axial movement of the rollingelements 13 and 14. The flange, or plate 17 also limits the discharge ofmaterial from the disintegrator B.

18 designates agitator paddles, or wings, place-d on th-e plate 17 atsuch angles to a radial line, and with the axis of the rotor, that theyimpart a tanning as well as a con- 6 desig- Y on which the casing 19revolves.

the rolling elements 31 and 32.

veying action to the pulverulent material. This flange or plate 17 ismounted on a square portion of the shaft 10, as shown in Fig. 5, so asto turn with the rotor.

.Figures 1 and 2 illustrate the disintegrator A which is provided with arotary casing 19 revolving in the direction opposite to that in whichthe rotor revolves. 20 is a ring gear which meshes with a pinion 21, thepitch circles of this gearing being indicated by dotted lines in Fig. 2.Power for revolving the gear 20 and casing 19 is transmitted to pinion21 through a shaft 22 to which the pinion is secured.

23 designates circular tracks formed on the casing 19 and resting ontrunnions 24 One end of this casing is closed by a stationary head 25provided with an inlet 26 for the material to be acted upon, and theopposite end' is closed by a stationary casing 27 into which thepulverulent material is discharged through openings 28 in a head'29carried by a shaft 30 which is secured to the rotor in the casing 19.This rotor is provided with recesses to receive rolling elements whichmay be in the form of balls 31 at the intake end of the casing, andconical rolls 82 receiving thefmateria-l passing from the balls.However, it is to be understood that the invention is not limited torolling elements of any particular shape. These rolling elements in thecasing 19 are acted upon by pushers 12 and 12. A b afiie plate 15 liesbetween The casing 19 is also provided with a flange, or plate, 17'having wings 18 corresponding to the elements 17 and 18 shown by Figures4 and 5. The material discharged from the rotary casing 19 flows throughthe stationary casing 27. and passes out through a discharge spout 34 toa hopper 35 leading to the inlet 4 of the disintegrator B. A suctionpipe 86 eX- tends from the hopper 35 to produce a classifying devicewhereby material of the required fineness is removed from thepulverulent material while the large tailings drop into thedisintegrator g The material introduced into each of the casings 1 and19 is subjected to three of the recognized processes of disintegration.

First-ROZZing.-The material is rolled over and crushed by the rolls orballs revolving about their own axes. v Se00ncZA ttm'tz'on..The materialis drawn between the rolls and those faces of the recesses acting as thepushers for the rolls. The slippage between the pushers and the rollsaxis of rotation, and these straight grinding ribs extend radiallybeyond the points of contact between said grinding faces and the rollingelements, to provide inlets for the material to be ground.

Thirdlmpa0t.The equivalent of a blow V is given the material ateachrotation of the rotatlng member, due to the fact that during theupward travel of the rolls the material to'be pulverized is subjected toa force varying from the centrifugal force imparted to the rolls bytheir rotation about the center of the cylindrical casing, plus all orpart of their weight, to the centrifugal force minus the weight of theroll, and then subjected to the reverse action on the downward travel.

It is evident that the impacting action becomes a smaller percentage ofthe crushing force applied, the higher speed of the rotor,

centrifugal force increasing as the square of the speed. Hence in orderto maintain the impacting action and increase the crushing action of themill it is possible to revolve the casing in a counterdirection to thatof the rotor. This increases the surface over WlllCl'l the rolls travelin a given time without aug-.

menting the centrifugal force in the rolling elements. 7

I claim:

1. In a disintegrator, a casing, arotor in said casing, two sets ofrolling elementsbetween said rotor and casing, and bafiles for retardingthe flow of material through the disintegrator, one of said bafflesbeing be-.-

let, a rotor in said casing and rolling elements located between saidrotor and casing, a conductor through which material is transmitted fromthe outlet of one disintegrator to the inlet of the other, and meanswhereby material of the desired fineness is withdrawn from saidconductor. 7

In testimony that I claim the. foregoing I hereunto afiix my signature.7

i WILLIAM M, DUNCAN.

